Well, I've built one. By level 5, it should work like this.
Urban Barbarian 1/Monk Weapon Adept 1/Fighter 2/Urban Barbarian 1
With 25pt buy, stats are 10/20(24)/15/13/16/8.
He uses a +1 Scimitar (Keen as soon as he can get it), Bracers of Armor +2 and a +2 belt of Incredible Dexterity.
Feats are Combat Reflexes, Weapon Finesse, Dervish Dance, Combat Expertise, Improved Trip, Furys' Fall and Cleave.
That means that, using weapon finesse with his unarmed attack to trip and Furys' Fall to add his dex again means that his CMB to trip is at +21 or something. He'll need to be level 7 or something to get Great Cleave and just whirlwind trip everyone over.
I guess to be maximally effective, you'd have to have your GM rule that you can flurry with a scimitar, but even so, he has Perfect Strike so it's not too bad (Honestly, Weapon Adept is a horrifying bad class all-up, as if monk needed to be made worse, although there are worse archetypes-Healing Hand and Lotus, I'm looking at you).
I tried to make Jin, too, but in the end, raw damage just didn't stack up to Mugens' ability to make everyone fall over in one attack (pretty much), so I had to branch outwards and go the Sword Saint Samurai 1/Two-Handed Fighter 1/Thug Rogue 1/Sword Saint Samurai 2 route and basically get Blade of Mercy and Enforcer and Intimidating Prowess and Skill Focus(Intimidate) (as a half-elf adopted by humans) and the Thug Frightening ability to make people frightened in a single hit. Later I could combine it with Cornugon Smash for extra hilarity, potentially making them have to make 3 saves against fear on a single round when I'm using Terrifying Iaijutsu or be Frightened for 3-4 rounds or Panicked for 2-3.
I could post that build if you'd like, but I'm pretty sure Jin wasn't able to make people run away with a single nonlethal poke.